Waterproof paper cup.



v E. E. CLAUSSEN & E. A. OLAUS.

WATERPROOF PAPER CUP.

APPLICATION FILED JUNE 1,1911.

1,006,722. Patented 001;. 24, 1911.

[n vwziww: Edward E. filauwm M'inwsw:

Elm? /f. (67mm EDWARD E. CLAUSSEN AND EMIL A. CLAUS, OIE HARTFORD, CONNECTICUT.

WATERPROOF PAPER CUP.

Specification of Letters Patent.

Application filed June 1, 1911. Serial 1V0. 630,592.

To all whom 'it may concern:

Be it known that we, EDWARD E. CLAUS- SEN andEMIL A. CLAUs, citizens of the United States, and residents of Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Waterproof Paper Cups, of which the following is a specification.

This invention relates to paper cups and particularly to such cups as are formed of an integral disk of paper having plaited side walls and coated with waterproofing material. p v

The object of our improvements is to provide a cup of the class specified, of substantial construction, pleasing appearance and cleanlyand comfortable in use.

To these ends our improvements comprise features illustrated in the accompanying drawings wherein- Figure 1 is a perspective view of a papercup embodying our lmprovements. Fig. 2 is a horizontal cross section on an enlarged scale of a portion of the side wall of our improved cup; Fig. 3 is a modified form of what is shown in Fig. 2; Fig. 4 is a vertical section on line 4, 4, of Fig. 2 and showing the upper edge of the cup. Fig. 5 is a view similar to that ofFig. 4 but on line 5, 5, of Fig. 2. Fig.- 6 is a vertical section on line '6, 6, of Fig. 3 and showing the top edge of the cup. Fig. 7 is a view similar to that of :Fig. 6 but on line 7 7, of Fig. 3. Flg. 8 is a horizontal cross section sim l r to that of Fig. 3 but howi g a. modification thereof. Fig. 9 is a Vertical section on line 9, .9, of

vFig. 8 nd showing the top edge of the cup.

Fig. 10 is a view similar to that of Fig. 9 but on line 10, 10, of Fig. 8. Fig. 11 shows a portion of a disk of paper suitably creased for folding, to form our improved cup.

Our improved cup is formed from a flat and preferably circular disk of paper 11 suitably creased as at 12 approximately radially, from a center and preferably cir: cular portion '13 commensurate with the proposed bottomof said cup, outwardly to the edge 14 of said disk. This disk is folded along said creased lines 12, 12 into tapering plants 15, and outer edge 14 thereof is preferably rounded outwardly to form a convenient lip 16. Said folding may be done by some convenient means, not shown, and the folded blank then squeezed into final shape by such well known means-as a pair of dies, not shown. We preferably dampen the disks ofpap'er previous to fold-' dies so that when the several thicknesses of the plaits of the side walls of the cup are squeezed between said dies that inherent sizing cements those thicknesses securely together thereby forming a continuous side wall comprising sections alternately of one thickness and a plurality of thicknesses of paper. The cup thusformed is then coated, preferably on the outside onlyas at 17,-Figs. 2, 4 and 5 with waterproofing material, such as -parafiin, and an extra portion of said paraffin 18 is deposited under and around the top rim 16, Figs. 4 and 5, thereby forminga beaded rim-of waterproofing material of smooth contour, of pleasing appearance and agreeable to the lips. In some instances,

While the paraffin is still soft we press. the cup in cold dies to cause the larger part of the coating of parafiin on the side walls, Fig. 2, to flow to thesingle thickness portions 19, 19 of said sidewalls Figs. 1, 3- and 6, whereby said sidewalls are rendered of uniform thickness throughout, thereby presenting a superior appearance. Also said diesmay have 'a contour which will form the beaded top edge of the cup into the symmetrical form 20 of the cross sections of Figs. 6 and 7. Or by coating our improved cup with paraffin both inside and out-and then pressing in dies, we obtain side walls of Patented oat. 2a, iaii.

uniform thickness, Fig. 8, and the uniform beaded rim of Figs. 9 and 10.

We claim 1. A cup, including in combination, an integral sheetof paper, a coating of waterproofing material and a beaded rim of waterproofing material.

'2. An integral paper cup having side walls comprising vertical sect-ions alternately of one thickness and a plurality of thicknesses of paper, an outer coating of thickness throughout and a, beaded rim of waterproofing material.

4. An integral paper cup having slde Walls of vertical sections alternately of one thickness and a plurality of thicknesses of paper, said plurality of thicknesses being cemented together by the inherent sizing of the paper and said cup having an outer coating' and a beaded rim of waterproofing material.

' Signed this 24th dayof May, 1911, at 

